Population genetic structure of the ark shell Scapharca broughtonii Schrenck from Korea, China, and Russia based on COI gene sequences.

Haplotype distribution, gene flow, and population genetic structure of the ark shell (Scapharca broughtonii) were studied using a partial sequence of a mitochondrial COI gene. The sequence analysis of 100 specimens obtained from a total of seven localities-five in Korea, one in China, and one in Russia- revealed 29 haplotypes, ranging in sequence divergence from 0.1% to 2.

Ultrastructural identification of a herpes-like virus infection in common carp Cyprinus carpio in Korea.

We report on a herpes-like virus, which was found to be associated with mass mortality of common carp Cyprinus carpio for the first time in Korea in 1998. The external signs of infection in moribund fish were darkened coloration and severe branchial necrosis in the gill. Transmission electron microscopy revealed the presence of herpes-like viruses in spleen tissue.